Syntax
#include
<PULSE.bas>
' source in /Program Files/Coridium/BASIClib
FUNCTION PULSIN
( pin, level )
Description
Measure an input pulse on pin at level, returning the
value to variable.
The IO direction of pin will be set to input.
If pin is already at level when the function is called
it will wait to a transition to the opposite level.
The function will wait 1 second for pin to go to level.
The length of time is measured in microseconds(us). The minimum
pulse that can be measured is 1 microseconds. If pin does not
go to level or remains at level longer
than 1 second variable is set to 0.
Example
#include <PULSE.bas>
'Wait for pin 7 to go high then low.
'Print the number of microseconds pin 7 was high.
tim =
PULSIN (7, 1)
PRINT "Pin 7 pulse high for "; tim; "
us"
Differences from other BASICs
- no equivalent in Visual BASIC
- Times are measured in microseconds rather than CPU dependent
ticks in PBASIC
See also
